Apparatus for copying drawings, &amp;c.



No. 771,775. FATENTED OUT. 1, 1904'.

J. M. e. FULLMAN.

APPARATUS FOR COPYING DRAWINGS, &c.

APPLICATION FILED SEPT. 11, 1902.

N0 MODEL.

J J c WI ii- Z Z illlllhllllllt Patented October 4, 1904.

UNITED STATES PATENT OFFICE.

JAMES M. G. FULLMAN, OF PITTSBURG, PENNSYLVANIA.

APPARATUS FOHSOOPYING DRAWINGS, ac.

SPECIFICATION forming part of Letters Patent No. 771,775, dated October{1, 1904.

Original application filed July 24, 1901, Serial No. 69,562. Divided andthis application filed September 11, 1902. Serial 7 N0.122,981. (Nomodel.)

T 0 all whom it may concern:

Be itknown that 1, JAMES M. G. FULLMAN, a citizen of the United States,residing at Pittsburg, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in Apparatusfor Copying Drawings, &c., of which improvement the following is aspecification, reference being had to the accompanying drawings, inwhich Figure 1 is a side elevation of my improved apparatus for copyingdrawings, tracings, negatives, &c. Fig. 2 is an enlarged sectionaldetail of rear post, showing application of canvas-clips. Fig. 3 is anenlarged detail in section of spring canvas stretcher or clip. Fig. 4 isa sectional view of the front post, taken on line a t of Fig. 1, showingapplication of fastener. Figs. 5 and 6 are respectively details of thespring-clip.

My present invention, which is a division of my copending application,Serial No. 69,562, filed July 24, 1901, relates to improvements inapparatus for reproducing or copying drawings, tracings, &c., andparticularly to means for securing the sensitized paper, subject-matterto be reproduced or copied, and the canvas or cover in contact with theexterior surface of the cylinder during the copying operation.

The object of my invention is to produce a flexible fastening device forsupporting the sensitized paper, subject-matter to be copied, and thecanvas cover upon the cylinder during the printing operation, which willadmit of the ends of the canvas cover being brought very close together,enabling the greatest possible area of surface to be utilized forcopying; and to accomplish this purpose it consists in the novelconstruction, combination, and arrangement of parts hereinafter morespecifically described, reference being had to the accompanyingdrawings, forming part hereof, in which like reference charactersindicate like parts wherever they occur throughout the several views.

Referring to said drawings, 1 is a verticallydisposed glass cylindercomprising two segmental sections a b, the ends of which are secured inthe wooden blocks or holders 0 d on opposite sides of said cylinder andwhich extend the entire length thereof, the lower ends of said cylinderbeing secured in the revoluble base 2. The said block or holder (Z isformed in two sections secured together by bolts (Z or in any othersuitable manner. The said cylinder is mounted on said base 2 and isadapted to be carried thereby in a circle, the base being provided withwheels 0 0, adapted to travel on ways f, supported on the subbase 3, toadmit of this.

On one side of said cylinder is arranged three vertically-disposed rods9 it c'. The rods 9 and a', to which the ends of the canvas cover 'issecured, as shown in Fig. 3, are formed of comparatively light materialand are secured with the ends of the canvas therearound within the jawsof the clips 7c, the opposite ends of said clips being clamped or hookedover flat-blade bow-shaped springs Z, similar springs m being secured tothe hooked fasteners or clasps p by means of screw n, which are adaptedto engage over the rod h and hold the canvas cover and the drawing ortracing against the exterior of the cylinder during the operation ofreproducing the same. The ends of said springs Z and m are secured inand riveted together in the U- shaped conjoiners or connectors q, thehook fasteners or clasps and the ends of the canvas cover being securedintermediate of the length of the bow-shaped spring thus formed, whichinsures a uniform distribution of the tension on the springs intightening the canvas around the cylinder. The said springs arevertically disposed, whereby a flexible fastening device is obtainedwhich will admit of the ends of the canvas being brought very closetogether, enabling the greatest possible area of surface to be utilizedfor copying.

On the side of the cylinder opposite to said fasteners are located aseries of fiat bladesprings 1', which are secured to the block (Z andconstitute clips or fasteners, the ends of said springs being providedwith projections s, which engage and press upon the ends of the canvasand subject-matter to be copied for the purpose of holding the samewhile the drawings and canvas are being adjusted around the exterior ofthe cylinder, as heretofore specified.

.A is an arc-lamp suspended upon cords 25, which pass over pulleys a,mounted in the brackets '11, which may be secured in any suitable mannerto a standard or to the wall of the room in which the apparatus islocated.

Having described my invention, what I claim, and desire to secure byLetters Patent, 1s

1. In an apparatus for copying or reproducing drawings, &c., thecombination of a cylinder, an arc-lam p adapted to be lowered therein,and fasteners to hold the subject-matter to be copied or reproduced incontact with the exterior of the cylinder comprising verticallydisposedblade-springs, the ends of which are conjoined, the said conjoinedsprings being connected to one end of the canvas and to the witnesses.

JAMES M. G. FULLMAN. In presence of CLARENCE A. WILLIAMS, JOHN H. RONEY.

